搜题，就来5TiKU.com题库【问题】 It has been quite a long time _____ the two companies established a business relationship.AalthoughBbecauseCifDsince
It has been quite a long time _____ the two companies established a business relationship.AalthoughBbecauseCifDsince
正确答案：D
题目解析：本题出自江苏开放大学，江苏开放大学大学英语A作业3，由丰阳塔题库搜集整理。
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